Omron 8U0108-E1-01, User Manual

Page: 316 / 333

XtraDrive User Manual
Appendix
C: Specifications for Peripheral Devices
C-18
If the amount of regenerative power that can be processed by the built-in
resistor is exceeded, install an external regenerative resistor for the capacity
obtained from the above calculation.
If the energy consumed by load system loss (in step 2 above) is unknown,
then perform the calculation using E
L
= 0.
When the operation period in regeneration mode is continuous, add the
following items to the above calculation procedure in order to find the
required capacity (W) for the regenerative resistor.
•
Energy for continuous regeneration mode operation period: E
G
(joules)
•
Energy consumed by regenerative resistor: E
K
=
E
S
- (E
L
+ E
M
+ E
C
) + E
G
•
Required capacity of regenerative resistor: W
K
= E
K
/ (0.2
⋅
T)
Here, E
G
= (2
π
/60) N
MG
x τ
G
⋅
t
G
•
τ
G
: Servomotor’s generated torque [oz·in (N·m)] in continuous
regeneration mode operation period.
•
N
MG
: Servomotor rotation speed (rpm) for same operation period as
above.
• t
G
: Same operation period (s) as above.
Servo Amplifier’s Absorbable Energy
The following diagrams show the relationship between the servo amplifier’s
input power supply voltage and its absorbable energy.
•
XtraDrive for 200V motor
•
XtraDrive for 400V motor
,
30